Collaborative pollution and carbon reduction behaviors of carbonated Pb-contaminated soil stabilized with a low-carbon binder derived from waste concrete
文献类型：期刊论文
| 作者 | Mu, Fangyuan3,4; Ji, Zhiqiang3; Lang, Lei4; Ma, Zihan1,2,4; Zhang, Wei4; Zhang, Zhaorong4; Li, Jiang-Shan1,4 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 17期号:3页码:1770-1785 |
| 关键词 | Waste concrete powder (WCP) Carbonation Lead-contaminated soil Microstructure Conductivity model |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2024.07.008 |
| 英文摘要 | Due to the limited hydration capacity, solidification/stabilization (S/S) with waste concrete powder (WCP) has a low strength. Carbonation can reduce carbon dioxide (CO2) emissions and improve strength of lead-contaminated soil, but its mechanism and environmental behaviors are unclear. In light of this, a comprehensive study was conducted on the compressive strength, lead immobilization, conductivity characteristics, and carbonation mechanism of carbonated Pb-contaminated soils stabilized with WCP compared to calcining 600 degrees C WCP. Results indicated that with carbonation, the compressive strength of the samples was significantly improved at the early stage (1 d), resulting in increased unconfined compressive strength (UCS) by 2.5-5.2 times due to the filling of pores by calcite. It negatively affected the lead immobilization capacity of highly doped (30%) samples, while this effect reversed after 3 d of carbonating due to the reduced alkaline environment. The lead immobilization capacity decreased after 28 d of carbonating due to the cracking of samples and the influence of a lower pH on the solubility of lead-carbonated hydroxide ((PbCO3)(2)Pb(OH)(2)). The water evaporation (saturation <16.8%) led to dry shrinkage cracking and decreased UCS of the samples. Based on this finding, a conductivity model was developed for carbonated and cured samples, accurately predicting changes in saturation levels (R-2 = 0.98). A relationship between conductivity and UCS or lead immobilization capacity was proposed. This research proposed an innovative method for the reduction of CO2 emission as well as laid down a theoretical basis for the recovery of WCP and lead-contaminated soils through carbonation. (c) 2025 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/). |
| 资助项目 | National Natural Science Foundation of China[42177163] ; National Natural Science Foundation of China[42071080] ; China Postdoctoral Science Foundation[2022M723347] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001448401200001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36629]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiang-Shan |
| 作者单位 | 1.Chinese Acad Sci, HK PolyU Joint Lab Solid Waste Sci, IRSM, Wuhan 430071, Peoples R China 2.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China 3.Yantai Univ, Dept Civil Engn, Yantai 264005, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mu, Fangyuan,Ji, Zhiqiang,Lang, Lei,et al. Collaborative pollution and carbon reduction behaviors of carbonated Pb-contaminated soil stabilized with a low-carbon binder derived from waste concrete[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2025,17(3):1770-1785. |
| APA | Mu, Fangyuan.,Ji, Zhiqiang.,Lang, Lei.,Ma, Zihan.,Zhang, Wei.,...&Li, Jiang-Shan.(2025).Collaborative pollution and carbon reduction behaviors of carbonated Pb-contaminated soil stabilized with a low-carbon binder derived from waste concrete.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,17(3),1770-1785. |
| MLA | Mu, Fangyuan,et al."Collaborative pollution and carbon reduction behaviors of carbonated Pb-contaminated soil stabilized with a low-carbon binder derived from waste concrete".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 17.3(2025):1770-1785. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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